CXXI. DIPSACE^. 



493 



Calpcera. 



Fruit crowned by the 



accrescent calyx. 



Oalycem. 



Anatropoiis ovule 



(mag.). 



Calyeerem is closely allied to Compositce, but is distinguislied by the nervation of the corolla, monadel- 

 pbous filaments, position of the ovule, absence of collecting hairs, globose stigma, and albumen. It isi 

 equally near Bipsacets, from which it differs in the alternate leaves, valvate sestivation, and monadel- 

 phous and syngenesious stamens. The species are not numerous, and mostly inhabit temperate South 

 America. 



CXXI. DIPSACEyE. 



(DiPSACB^, A. L. de Jussieu.] 



CoEOLLA monopetaloun, epigynous, wstivation imbricate. Stamens 4, inserted on 

 the tube of the corolla. Ovaet l-celled, 1-ovuled, adnate to the receptacular tube 

 throughout its length, or only at the top ; ovule pendulous, anatropous. Embexo 

 albuminous. 



Annual or perennial heebs. Leaves opposite, rarely whorled, exstipulate. 

 Flowees perfect, more or less irregular, gathered into a dense capitulum, involu- 

 crate, on a naked or paleaceous receptacle, very rarely in a whorl in the axil of the 

 upper leaves, and each furnished with a calyciform obconic involucel, the tube of 

 which is pitted at the top or furrowed lengthwise, and its limb scarious. Calyx 

 superior, cup-shaped, or in setaceous segments forming a naked or bearded plumose 

 crown. CoEOLLA superior, mouopetalous, tubular, inserted at the top of the recep- 

 tacular tube; limb 5-4-fid, usually irregular, sometimes labiate, aestivation imbricate. 

 Stamens 4, often unequal, rarely 2-3, alternate with the coroUa-lobes, inserted at 

 the bottom of the tube ; filaments exserted, distinct, or rarely united in pairs ; anthers 

 introrse, 2-celled, dehiscence longitudinal. Ovaet inferior, l-celled, 1-ovuled, some- 

 times free in a receptacular tube which is closed at the top, sometimes adhering to 

 this tube throughout its length, or at the top only ; style terminal, filiform, simple, 

 united at its base to the neck of the receptacular tube ; stigma simple, claVate, or 

 very shortly and unequally 2-lobed; ovule pendulous from the top of the ceU, ana- 

 tropous. Uteicle enclosed in the receptacular tube and the involucel. Seed 

 inverted, testa membranous, hardly separable from the pericarp. Embeto straight, 

 in the axis of a fleshy scanty albumen ; radicle superior. 



GENERA. 

 * Dipsacus. * Morina. , * Cephalaria. Knautia. 



*Scabiosa. Pterocephalus. 



